684393212 has 6 divisors (see below), whose sum is σ = 1197688128. Its totient is φ = 342196604.

The previous prime is 684393163. The next prime is 684393239. The reversal of 684393212 is 212393486.

It is a super-3 number, since 3×684393212³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85549148 + ... + 85549155.

It is an arithmetic number, because the mean of its divisors is an integer number (199614688).

Almost surely, 2^684393212 is an apocalyptic number.

It is an amenable number.

684393212 is a deficient number, since it is larger than the sum of its proper divisors (513294916).

684393212 is a wasteful number, since it uses less digits than its factorization.

684393212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171098307 (or 171098305 counting only the distinct ones).

The product of its digits is 62208, while the sum is 38.

The square root of 684393212 is about 26160.9099994629. The cubic root of 684393212 is about 881.2556163349.

The spelling of 684393212 in words is "six hundred eighty-four million, three hundred ninety-three thousand, two hundred twelve".